36w 6.5' Flood bars: Work good. I actually prefer the 18W 4' flood bars better. These 6.5' bars have quite a light 'halo' that the 18w 4' ones don't, the smaller ones disperse a more even flood. but these 36w are a little bit brighter.
I have used or tested and reviewed the following Nilight LED lights:
–2PC 27W Round Flood: work ok, great price but the 18W 4' Flood bars throw and disperse light better and seem just as bright.
–2PC 27W Round Spot: don't bother. Had them next to the 27W round floods and could not see any difference.
–32' 180W Bar Spot Flood Combo (Double-row LED, Straight): so far it's awesome. great flood at sides and a great bright spot. awesome for the money.
–2PC 18W 4' Flood Bar: work great. highly recommend for bright light for less than +-50 yards.
–2PC 18W 4' Spot Bar: great little spot lights. Mounted on my '02 Tacoma bumper as fog lights wired with my high beams.
–2 piece NI18A-5 5.3' double-row Flood Bar: fairly bright broad flood dispersement, very flat wide beam, good for fog/driving lights. Seem just as bright as 36w 6' bars.